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TI-2018-08895 Aliases CVE-2018-12396GHSA-5c59-7337-gvv9

Incorrect permission assignment in Mozilla Firefox ESR

Priority LOW 33CWE-732Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.

Summary

A vulnerability where a WebExtension can run content scripts in disallowed contexts following navigation or other events. This allows for potential privilege escalation by the WebExtension on sites where content scripts should not be run. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.

Why it matters now

EPSS 0.02273 83rd percentileScored 2026-11-07
Fix Fixed Firefox ESR (Mozilla): 60.3Firefox (Mozilla): 63Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefox ESRbefore 60.360.3Patch availableCNA
MozillaFirefoxbefore 6363Patch availableCNA
  • Firefox ESR VendorMozilla Affected before 60.3 Fixed in 60.3 Patch available CNA
  • Firefox VendorMozilla Affected before 63 Fixed in 63 Patch available CNA

CPE configurations NVD · 17

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 63.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 60.3VulnerableMozilla
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*18.10VulnerableCanonical
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 63.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 60.3 Vulnerable ·Mozilla
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
Show 7 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

  • Fix · CNA Firefox ESR (Mozilla) Fixed in 60.3
  • Fix · CNA Firefox (Mozilla) Fixed in 63

Red Hat 2 advisories

  • RHSA-2018:3006 Released 2018-10-24 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-60.3.0-1.el6
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-60.3.0-1.el6
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-60.3.0-1.el6
    • Red Hat Enterprise Linux Server (v. 6) firefox-60.3.0-1.el6
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-60.3.0-1.el6
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-60.3.0-1.el6
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-60.3.0-1.el6
  • RHSA-2018:3005 Released 2018-10-24 · Red Hat rating Critical
    firefox security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) firefox-60.3.0-1.el7_5
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-60.3.0-1.el7_5
    • Red Hat Enterprise Linux Server (v. 7) firefox-60.3.0-1.el7_5
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-60.3.0-1.el7_5
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-60.3.0-1.el7_5
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-60.3.0-1.el7_5
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox-60.3.0-1.el7_5

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Mozilla Firefox, Firefox ESR — USN-3801-1

    12 records Highest priority Priority MEDIUM 4 MEDIUM, 8 LOW

    Other records, highest priority first

    • TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
    • TI-2018-08890 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    • TI-2018-08888 Memory corruption in Mozilla FirefoxPriority MEDIUM 41
    Show all 12 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2018:3005

    7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
    • TI-2018-08890 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    • TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
    Show all 7 records → Advisory →
Show 3 more groups
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2018:3006

    7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
    • TI-2018-08890 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    • TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
    Show all 7 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — GLSA-201811-04

    7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
    • TI-2018-08890 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    • TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
    Show all 7 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — DSA-4324

    7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
    • TI-2018-08890 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    • TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
    Show all 7 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:3005
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:3005
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2018:3006
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2018:3006
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2018:3006
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2018:3006
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3005
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2018:3006
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:3005
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2018:3006
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3005
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2018:3006
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:3005
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:3005
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-12396
  2. 2026-10-03 Alias added: GHSA-5c59-7337-gvv9

References

Advisory 9

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences